MFC: arm64 fixes for TSLOG

arm64: Disable early printf if TSLOG
arm64: Instrument initarm with TSLOG
libsa: Add tslog support for arm64

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(cherry picked from commit 0acc529dc35f88836dbcbe75940954c75595b058)
(cherry picked from commit ccadcb8f3343562f22a426e845dba640319d4355)
(cherry picked from commit e6caac717b4fc2b87cf93f67109884e768253e77)